Popped into Tesco Gillingham fuelling station this morning and found all their range of motor oils reduced. Various grades and prices, cheapest for 4 litres was £4.00, believe it was 10w-40 Semi-Synthetic, all grades were heavily reduced.
I grabbed a couple of the 5w-30 Ford High Mileage Fully-Synthetic at £6.50 each, usually £20.
Doesn't seem to have 'filtered' through to online yet, took a few days the last time they had an oil stock clean-out.
Worth considering if you fancy having a change...